The 1671-10S is a Duster blows away dust, microscopic contaminants, lint, metallic oxide deposits and other soils that can cause heat build-up or shorts in sensitive electronics. Can must be held in an upright position when spraying. Do not tilt can more than 40° during spraying operation or shake during use. Before use, press actuator to clear valve of any liquid product. Use short burst to prevent cooling of can. It is in the form of colorless gas with faint ethereal odor.